This is JDeveloper, the best free Joomla component creator on the web. JDeveloper supports components, modules, plugins, packages and templates.
it is totally free
unlimited components, tables and fields
simple, effective and powerful
all Joomla standart functions supported (categories, publishing options, accesslevel, access control for each item)
What it can do:
Import tables from database / XML form definition
Cretate and install your extensions directly with one click
Create nested table sets
Create own XML form definitions
Create own JFormField and JFormRule classes
Translate your tables to SQL code or to XML form definition
Create relational database tables
Facebook: Joomla JCMS Development
Version 1.6.0 (6th October 2014) :
Create arbitrarily nested xml form definitions.